DYNAMIC INPUT METHOD FOR PROGRAMMABLE CONTROLLER

PURPOSE:To simplify the constitution of a device by fetching the input data of a digit to be designated with a digit designating signal and judging the fetching completion of the input data with the input of a delay digit designating signal, whose phase is delayed for a prescribed time from the digit designating signal. CONSTITUTION:The input data are inputted from an input circuit part 1 and the digit designating signal is outputted as data by a control part 10 and inputted to the input circuit part 1 and a signal delay circuit part 8. Only the input data of the designated digit are fetched by the input circuit part 1 and outputted to an input data control part 6. On the other hand, the delay digit designating signal, whose phase is delayed by the prescribed time from the digit designating signal, is sent through the input data control part 6 and an output data control part 7 to the control part 10 by the signal delay circuit part 8. The control part 10 compares the inputted delay digit designating signal and the digit designating signal to be inputted in advance and when the digit designation is the same, the fetching is judged to be completed and the input data are fetched from the input data control part 6. Thus, the constitution of the device can be simplified.